With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrIpMcastCacheStatsCacheTableMaxEntries
Virtual Router Ip Mcast Cache Stats Cache Table Max Entries
This attribute indicates the current maximum number of entries that can exist in the IP local cache table on each LP.
Back to Nortel-Magellan-Passport-IpMIB MIB page.
IPHost Network monitor allows you to monitor vrIpMcastCacheStatsCacheTableMaxEntries on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Nortel speech servers right now.